(1):

(n.) One of the Reptilia, or one of the Amphibia.

(2):

(a.) Hence: Groveling; low; vulgar; as, a reptile race or crew; reptile vices.

(3):

(a.) Creeping; moving on the belly, or by means of small and short legs.

(4):

(n.) An animal that crawls, or moves on its belly, as snakes,, or by means of small, short legs, as lizards, and the like.

(5):

(n.) A groveling or very mean person.